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"Race" is more of a social construct than a biological distinction. That doesn’t mean "races" don’t exist, it just means it’s difficult, if not impossible, to label people with a distinct, finite number of races.

One way using if/else would be bad design, from an OOP standpoint, is if you’re using a chain of instanceof checks instead of polymorphism.

Kenny Yu mentioned the standard ways to loop through an array. A unique way, I suppose, is to use recursion.

There are four access specifiers in Java: public, private, protected, and default. Three of them use their associated word, while default uses none.

When dealing with numbers, it adds them like you’d expect. When dealing with string, it concatenates them. That is, puts one after another into another string.

You can even do a little shorter than Garry Taylor’s solution, by giving main’s argument a shorter name: